Ufacturing



J. A. v. TURCK 1,714,964

CALGULATING MACHINE Filed March l2, 1921 4 Sheets-Sheet l @OOO i W *im0000000 mv ol.. ,OOOOQOOM OOOOOOOOM@ 0 an400000000@ M WOOOOOOOOAWW000000001www0 i .w i 1, i

May 28, 1929.

May 28, 192Q.

J. A. V. TURCK CALCULAT ING MACHINE Filed March 12 1921 4 Sheets-Sheet.2

v May 28, 1929. .1. A. v. TURCK CALCULATING MACHINE Filed 'March 12 19214 SheeS-Sheef.. 3

May 28, 1929. J. A. v. TURCK 1,714,964

CALCULATING MACHINE Filed March 12, 1921 4 Sheets-Sheet 4 Muy' QM@Patented May 28, 1929.

UNITED STATES PATENT OFFICE.

JOSEPH A. V. TURCK, OF WILMETTE, ILLINOIS, ASSIGNOR TO FELT & TARRANTMAN- UFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

CALCULATING MACHINE.

Application filed March 12, 1921. Serial No. 451,722.

This invention relates to calculating machines and has for its primaryobject to provide an improved mechanism for preventing errors incalculating operations, which may arise from mismanipulation of thekeys; and the invention comprehends the provision of means for effectingan immediate visible indication to the'operator of a mismanipulated key,such visible indication being, in the present embodiment of theinvention a visual indicator which moves into an errorindicatingposition with respect to the items registered by the numeral wheels,immediately upon mismanipulation of a key, and remains in such positionuntil a zeroizing operation has been effected to clear the machine. Theinvention is particularly applicable for use in connection withcalculating machines of the key-driven multiple order type, strictedthereto, and, in the present embodiment, is illustrated in a machine ofthe general type of the well known Duplex comptometer, the generalcharacter of which is exemplified in the UnitedStates patents to Dorr E.Felt, No. 762,520 and No. 762,521, dated June 29, 1904; No. 1,066,096,dated July 1, 1913; No. 1,072,938, dated September 9, 1913; the patentto Kurt. F. Ziehm, No. 11.110,7 34, dated September 15, 1914, and myprior Patents Nos. 1,357,747 and 1,357,- 748, dated November 2, 1920.

In addition to the general object recited above, the invention has forfurther objects such otherimprovements and advantages in constructionand operation as may be found t0 obtain in the structures and deviceshereinafter described or claimed.

In the accompanying drawings, forming a part of this specification andshowing, for purposes of exemplification, a preferred form and manner inwhich the invention may be embodied and practised, but without limitingthe claimed invention specifically to such illustrative instance orinstances, illustrates in Figure 1 is a plan view, with parts brokenaway, of a caluculating machine of the multiple order 4key-driven typein which the present improvements are embodied;

Figure 2 is a vertical sectional elevation taken' at the left-hand sideof the machine although not necessarily re' in a, plane indicated by theline 2-2 of Fig. 1;

Figure 3 is a vertical sectional elevation taken along the right-handsid-e of the machine in a plane indicated by the line 3-3 of Fig. l; an

Figure 4 is a vertical sectional elevation taken in a plane indicated bythe line 4-4 of Fig. l.

The same characters of reference indicate the same parts in each of theseveral views of the drawings.

In its present embodiment, the invention is incorporated in acalculating machine of the multiple order key-driven type, such as thewell known comptometer disclosed in prior United States Lett-ers Patentshereinbefore referred to. The details of construction of this type ofmachine may be readily understood from these and other prior UnitedStates patents issued to Felt & Tarrant Manufacturing Company andreference is hereby made to such patents for a description of this typeof machine.

The present invention comprehends the provision of means tor effectingan immediate visible indication, to the operator, of a mismanipulatedkey, and, in the present instance, by the provision of a shutter whichmoves into a position to conceal t-he items registered by the numeralwheels, immediately upon mismanipulation of a, key, and remains in suchposition until. a zeroizing operation has been effected to clear themachine. The registrations effected by -opcration of the accumulatormechanism, in the manner hereinabove referred to, are viewed throughsight openings 65 located in the forward portion of the casing top, asshown more particularly in Fig. 1. Should a key 25 be only partiallydepressed and released, the partial key stroke will, of course, effectonly a partial operation of the accumulator mechanism in the order whichthe key controls, and consequently an erroneous-result will be indicatedin the registration 'made by the numeral wheels of the accumulatormechanism. lVhen any key is partially depressed and released, the usualspring at the bottom of its stem will throw it up, but the actuator hasmoved the lantern wheel and 'connected numeral wheel an erroneous numberof. numeral spaces, and the error is signaled lby the movement of avisual indicator with respect to the several numeral wheels, such as a.shutter, which may move into an errorindicating position in cooperationwith the registrations viewed through the sight openings 65.

On the initial depression of a key, as above described, when the lever103 (Fig. 2) moves forwardly, the arm 110 encounters the latch 120 onthe point of its hook and forces it forward slightly and follows down,as the rear arm of the lever 103 tilts downward under pull of springs104, 105, along with the incline of the hook of the latch, thus escapingbeing locked up. When in this position the arm 110 is tilted upwardly itdisplaces the latcli forward and the spring 121 returns the latch underthe arm to hold it up.

When a key is partially depressed and released, the forward end of lever103 is elevated and so held by the springs 104 and 105, as abovedescribed. On release of the key, the accumulator is turned by theupward movementv ofthe segment lever but the auxiliary lever 8,6 (Fig.4) rises and lets up 'the arm 89 and the spring 93 pulls back the link95 and lever 103 and the rear end 123 of the lever encounters andthrusts backward the square shaft 124 hung by the arms 125 from the rockbar 126. A link 130 (Fig. 2) is pivotally connected at its 'rear end tothe shaft 124, and at its'forward end with a swinging arm 131a adaptedto connect with the lower arm 131 of a bell crank pawl having itsfulcrum on the shaft 132. Both said link 130 and the'bell crank pawl arelocated on the left-hand Side of the machine, as shown in Fig. 2. Theother arm 133 'of the aforesaid bell crank pawl extends forwardly and isprovided at its extreme forward end with a detent 134 adapted toco-.operate with a detent 135 at the lower end of the left-hand wing 136of a. shutter 137. The shutter 137 extends transversely across themachine over the top of the several numeral wheels 38 and is pivoted, bymeans of its lefthand wing 136 and a right-hand wing 138, on the shaft37 of the numeral wheels. Referring to Fig. 3, a spring 139 connects theright-hand wing 138 of the shutterwith a iixed part. 140 of the frame.

On rearwardmovement of the square shaft 124, b means of the connectionsabove describe which rearward movement takes place on partial depressionand release of a key 25, the link 130 'isvpulled rearwardly, as wellv as.the depending arm 131 of the bell crank pawl, and said .rearwardmovement of the arm 1,31 is accompanied by a depression of the forwardend of the arm 133, which depression moves the detent 134 out ofengagement with the detent 135 at the lower end of the wing 136 of theshutter, thereby releasing the shutter from the restraining influence ofthe arm 133 and freeing the spring 139. Thereupon the spring 139 pullsthe shutter 137 forwardly into position for indicating an erroneousregistration through the sight openings 65.

This forward movement of the shutter is accompanied by a rearward'lmovement of a detentv140n which projects downwardly below the pivotpoint 37 of the shutter. As

the detent 140a moves rearwardly, as viewed in Fig. 3, it engages a face141 of a rocker arm 142 that depends from and is pivoted on the shaft37. The lower end of the rocker arm 142 is pivotally connected by meansof a link 143 with the lever arm 74.

On a Zeroizing movement of the zeroiz ing lever 71 the rocker arm 7 4 ismoved for wardly, in the manner hereinabove described, and theconcurrent forward movement of the link 143 moves the detent 140aforwardly and the shutter 137 rearwardly, said rearward movement of theshutter inturn moving the detent 135 on its left-hand end into positionfor being reengaged by the detent 134 at the extreme forward end of thearm 133 of the bell crank lever.

The zeroizing movement of the lever 71 is accompanied by an operationwhich restores the square shaft'124 to its normal position, saidoperation being effected by instrumentalities fully shown and describedin the foregoing-mentioned prior United kStates patents, and, as themechanism for restoring the shaft 124 to normal position forms no partof the present invention, it need not be herein described in detail. Themovement of the shaft 124 to normal, through the link 130 and dependingarm 131 ofthe bell crank pawl, restores the detent 134 into position forreengaging the detent 135. Consequently, when the shutter has been movedrearwardly by the operation of the zeroizing lever as above described,the movement of the parts 124, 130, 131 and 133 into normal positioneects a relooking of the shutter in its normal rear inoperativeposition.

The calculating machine described in the above specification embodiesvarious other instrumentalities and devices which need not be hereindescribed, for the reason that they are fully set forth in the priorpatents above mentioned.

The invention as hereinabove set forth is embodied in a particular formof construction, but may be variously embodied in other forms of visualindicators adapted to be positioned in the sight apertures, within thescope of the claims hereinafter made.

I claim:

1. In a calculating machine,in combination: a plurality of keys; numeralwheels; actuating devices for said numeral wheels rendered operativeupon movement of the keys; a shutter adapted to conceal theregistrations made by said numeral wheels; spring means for moving saidshutter into position for concealing such registrations; devices fornormally retaining said shutter in inoperative position; means operableon partial depression and release of a key for releasing said devices,to permit movement of said shutter into registration concealingposition; a zeroizing crank;,and connections between said zeroizingcrank and said shutter operable during a zeroizing movement of saidcrank for restoring said shutter to its normal inoperative position;substantially as specified.

2. In a calculating machine, in combination: a plurality of keys;numeral Wheels; actuating'devices for said numeral Wheels renderedoperative upon movement of the keys; trations made by said numeralWheels, spring means for moving said shutter into position forconcealing 4said registrations; devices for normally retaining'saidshutter in inoperative position; means operable on partial depressionand release of a key for releasing said devices, to permit movement ofsaid shutter into registration concealing position; a zeroizing crankand connections between said zeroizingl crank and said shutter operableduring a zeroizing movement of' said crank for restoring said shutter toits normal Ainoperative position, said devices being movable intoshutter restraining position during a zeroizing movement of said crank;substantially as specified. v

3. In a calculating machine, in combination: a plurality of keys;numeral wheels; actuating devices for said'numeral Wheels renderedoperative upon movement of the keys; a shutter adapted to conceal theregistrations made by said numeral Wheels; spring means for moving saidshutter into position for concealing such registrations;

devices for normally retaining said shutter.

in inoperative position; means operable on partial depression andrelease of a key for releasing said devices, to permit movement of saidshutter into registration concealing position; and means for restoringsaid shutter to its normal inoperative position; substantially asspecified.

4. In a calculating machine, in combination: a plurality of keys;numeral wheels; actuating devices for said 'numeral Wheels renderedoperative upon movement of the.

keys; a shutter movable into position for concealing the registrationsmade by said numeral Wheels; devices for normally retaining such shutterin inoperative position; means operable ,on partial depression andrelease of a key for releasing said devices, to permit movement of suchshutterinto rega shutter adapted to conceal the regis` crable on partialistrati on concealing position; and means for rcstoring'such shutter toits normal inoperative position; substantially as specified.

5. Ina calculating machine, in combination: a plurality of keys; anaccumulator mechanism operable on movement of said keys for effectingregistrations; a registration-concealing shutter for lvisuallyindicating key mismanipulation; means controlled by key mismanipulationfor effecting the operation of said shutter; zeroizing means; and meanscontrolled by said zeroiz'- ing means for rendering inoperative saidshutter; substantially as specified.

6. In a calculating machine having a registration sight-opening means,in combination: a plurality of ordinal keys; an ordinal accumulatormechanism operable on movement of said keys for effecting registrationsvisible in said sight-opening means; a device for visually indicating,in said sight-opening means, key mismanipulation; and means controlledby key mismanipulation for effecting the operation of said indicatingdevice; substantially as specified.

' In a calculating machine, in combination: a plurality of ordinal keys;ordinal registers; actuating devices for the registers renderedoperative upon movement of the keys; a register obscuration device;means for operating said obscuration device; means adapted normally toprevent operation of said'obscuration device; and means operable onpartial depression and release of a key for releasing saidoperation-preventing-means, to permit operation of Said obscurationdevice; a zeroizing crank; and connections between'said zeroizing crankand said obscuration device operable during a zerolzing movement of saidcrank for restoring said obscuration device to its normal inoperativeposition; substantially as specifie 8. In a calculating machine, incombination: a plurality of ordinal keys; ordinal registers; actuatingdevices for said registers rendered operative upon movement of the keys;a register obscuration device; meansV for operating said obscurationdevice; means adapted normaly to prevent operation of said obscurationdevice; means opdepression and release of a key for releasing saidoperation-preventingmea-ns, to permit operation of said obscurationdevice; and' means for restoring said obscuration device to its normalinoperative position; substantially as specified.

In testimony whereof, I have hereunto set my hand.

JOSEPH A. V. TURGK.

